THMC coupling effect rock fracture shear test instrument

Abstract

The invention discloses a THMC coupling effect rock fracture shear test instrument, and belongs to the field of oil and gas development instruments.The THMC coupling effect rock fracture shear test instrument comprises a pair of workbenches, arc-shaped sliding grooves are formed in the opposite ends of the workbenches, and semicircular wheels are rotationally connected into the arc-shaped sliding grooves; toothed rings matched with the arc-shaped sliding grooves are fixedly connected to the outer walls of the semicircular wheels, a pair of sealing belts is arranged between the pair of semicircular wheels and comprises a pair of composite waveguide tubes, a pair of vertical sealing belts are connected between the pair of composite waveguide tubes, upper sealing plates are fixedly connected to the upper ends and the lower ends of the composite waveguide tubes, and an infusion tube matched with the quick connector is inserted into the mounting hole. According to the scheme, when the two workbenches are freely combined to clamp stones with different cracks, the sealing effect of the device can be guaranteed, the rocks with different sizes and cracks can be conveniently subjected to experiments, the sealing mechanism can be self-repaired, and damage to the device caused by broken stones is effectively reduced.

Description

technical field [0001] The invention relates to the field of oil and gas development instruments, in particular to a rock fissure shear test instrument for THMC coupling. Background technique [0002] In rock mass engineering, groundwater is one of the important factors affecting the stability of rock mass engineering. Rock mass is composed of rock blocks and fissures. Fissures are the main channels for water conduction. Occurs in rock fractures, so stress has an important impact on the permeability of fractured rock mass. Scholars at home and abroad have made some progress in the research on the influence of normal load and tangential load on the permeability of rock fractures, mainly using two methods: laboratory test and numerical simulation. [0003] At present, the shear seepage test mostly adopts the linear flow method, and the two sides of the crack of the sample are sealed with rubber bags, and the water enters and exits from the other two sides. This method has th...

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Problems solved by technology

This method has the following disadvantages: ①The lateral rubber bag is required to have greater elasticity, so that it cannot break and leak during the shearing process, and cannot generate excessive shear force; ②It needs to apply a large load to the rubber bag to make it contact with The rock samples are in close contact. When the load is low, the seal may not be good and cause lateral water leakage. When the load is large, when the upper and lower rock blocks of the sample produce relative shear displacement, the rubber bag may be damaged.

The radiation flow test does not require the sealing of the two sides of the crack. As long as water enters from the center of the hole and water exits from the crack, the single-crack rock radiation flow test can be realized. there is no mature way

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